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/*
* File : console.c
* This file is part of Device File System in RT-Thread RTOS
* COPYRIGHT (C) 2004-2011, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
*/
#include <rtthread.h>
struct console_device
{
struct rt_device parent;
rt_device_t device; /* the actual device */
};
struct console_device _console;
/* common device interface */
static rt_err_t console_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t console_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t console_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t console_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
struct console_device* device;
device = (struct console_device*)dev;
RT_ASSERT(device != RT_NULL);
return rt_device_read(device->device, pos, buffer, size);
}
static rt_size_t console_write(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
struct console_device* device;
device = (struct console_device*)dev;
RT_ASSERT(device != RT_NULL);
return rt_device_write(device->device, pos, buffer, size);
}
static rt_err_t console_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return rt_device_control(_console.device, cmd, args);
}
void rt_console_init(const char* device_name)
{
rt_device_t device;
/* register to device framework */
device = rt_device_find(device_name);
if (device != RT_NULL)
{
struct console_device* console;
/* get console device */
console = &_console;
rt_memset(console, 0, sizeof(_console));
/* device initialization */
console->parent.type = RT_Device_Class_Char;
/* set device interface */
console->parent.init = console_init;
console->parent.open = console_open;
console->parent.close = console_close;
console->parent.read = console_read;
console->parent.write = console_write;
console->parent.control = console_control;
console->parent.user_data = RT_NULL;
console->device = device;
rt_device_register(&console->parent, "console", RT_DEVICE_FLAG_RDWR);
}
}
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